Sources

found: Wikipedia, viewed 18 March 2014(Alexei Anatolievich Navalny, born 4 June 1976, is a Russian lawyer, political and financial activist, and politician)

found: New York times, 27 December 2017:front page (Taking no election chances, Russia muffles a noisy Putin critic; Aleksei A. Navalny, a Russian anticorruption activist, would have no real chance of defeating President Vladimir V. Putin in an election. The authorities have cast him as an utterly irrelevant showboat. But on Monday the Kremlin barred him from running for president in March. Then on Tuesday, threatening legal action, it warned him against organizing a boycott of the election.)